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FRAC QoI Working Group

FRAC QoI Working Group. Status of Activities June 2005. Membership. Karl-Heinz Lorenz leaves the group (BASF) Martin Semar joins the group (BASF). Meetings of the Group in 2005. To address the issue that there are many pathosystems and not all results available Nov. 04:

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FRAC QoI Working Group

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  1. FRAC QoI Working Group Status of Activities June 2005

  2. Membership Karl-Heinz Lorenz leaves the group (BASF) Martin Semar joins the group (BASF)

  3. Meetings of the Group in 2005 To address the issue that there are many pathosystems and not all results available Nov. 04: Teleconference June 2nd Items: H teres, R secalis, DTR, U necator. Also QiI vs QoI

  4. New Results 2004 (1) Rhynchosporium secalis: confirmed fully sensitive Uncinula necator: confirmed fully sensitive follow up on Wilcox publication 2003 via NAFRAC (done) re. USA "R" isolates

  5. New Results 2004 (2) Helminthosporium tritici-repentis (DTR / HTR): Confirmed reduced sensitivity in Sweden Denmark, France, Germany (Bayer, BASF, Syngenta) Mostly F129L mutation 5 isolates found by Syngenta in DE and DK with only G143A Further investigation needed Helminthosporium teres: Reduced sensitive isolates confirmed in parts of France, and in UK, BE (at low levels). New – I isolate South-West DE. All with F129L mutation Isolates characterised, show a dose response to QoI (BASF, Syngenta) Product performance (mixtures) good in all cases

  6. QiI and QoI Fungicides Issue Issue ex- D Hollomon who claims AOX to have a role in resistance in both QoI and QiI Good database exists from several companies including ISK to show no cross-R cyazofamid and QoI Contacts established with ISK, also with FRAG-UK on the matter (AJL) Agreed on June 2 that QoI FRAC should prepare a position stating the phenomenon to have no practical relevance.

  7. Communication Web page: minutes and guidelines practical guide to F129L vs G143A - done bibliography of pathogens known to have field resistance cases (to QoI) – done QiI and QoI position statement (in prep.) Countries: DE Journal publication "Land und Forst" - done Other countries: as needed Next Meetings: Oct 11; Nov 29th Bad Homburg

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